What are the characteristics of facilitated diffusion? 1 Protein channels in the membrane are used, and it is powered by energy from ATP. 2 Molecules move from areas of higher concentration to areas of lower concentration, and the process is driven by the kinetic energy of the diffusing molecules. 3 Protein channels in the membrane are used, and the maximum rate of diffusion depends on how many of these channels are present.
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3